Variable golf putter

ABSTRACT

A variable golf putter is disclosed. The variable golf putter includes a putter head coupled to the lower end of a shaft, the putter head having a head hitting surface, and a hitting member selectively coupled to the putter head. The hitting member has various hitting surfaces, whereby it is possible to perform putting practice in various manners. In addition, the hitting member and the hitting material made of a material different from the material of the hitting member are formed integrally with each other, whereby it is possible to provide various hitting sensations and thus to efficiently perform putting practice.

TECHNICAL FIELD

The present disclosure relates to a variable golf putter, and moreparticularly to a variable golf putter capable of replacing and using ahitting surface of the putter and of providing various hittingsensations, thereby efficiently performing putting practice toaccurately putt a golf ball on a putting green into a hole cup.

BACKGROUND ART

In general, a putter is a tool used when directly hitting a ball on agreen toward a hole cup using an iron club for putting, and puttingmeans an action of hitting a ball using a putter.

In order to successfully perform putting, a putting direction and senseof distance are important. However, the most basic requirement is acorrect putting posture. To this end, a great number of practice puttsmay need to be performed for a long time to learn such a sensation.

Here, the correct putting posture means that both hands holding a gripperform a pendulum motion about the head of a golfer at the time ofswing and the head of a putter impacts a ball at the lowest point of thependulum motion. The ball hit at the posture described above will travelto a desired position.

If the wrists are bent or the body shakes at the time of swing, thependulum motion is not accurately performed. As a result, the ball isimpacted at an inappropriate position, whereby the ball is not sent to adesired position.

In order to solve this problem, putting practice may be performed usinga putter for practice.

As a prior art document, a putter for golf practice is disclosed inKorean Registered Utility Model No. 20-0350462 (published on May 13,2004).

As shown in FIG. 1, a conventional putter 1 for golf practice isconfigured such that a triangular or semicircular hitting protrusion 2Aconfigured to accurately hit a golf ball 2 is formed at the center ofthe front of a putter head 2. The putter 1 for golf practice has anadvantage in that it is possible to perform practice of accuratelyhitting the golf ball 3 using the semicircular hitting protrusion 2A.

In the putter 1 described above, however, the putter head 2 and thehitting protrusion 2A are integrally formed, whereby it is not possibleto apply hitting protrusions 2A having various structures.

As another prior art document, a putting practice member for golfputters is disclosed in Korean Registered Utility Model No. 20-0395835(published on Sep. 14, 2005). As shown in FIG. 2, fixing plates 1′ and1″ are formed at opposite sides of a putting member 1 having a hittingportion 1A having the largest width formed at the middle portion thereofand a center line 101 marked on the upper surface thereof, the puttingmember 1 is fixed to a putter head 2 using rubber bands 3 in the statein which the fixing plates 1′ and 1″ are in contact with the putter head2. The putting practice member having the structure described above isconfigured to replace the putting member 1. Since the putting member 1is coupled to the putter head using the rubber bands 3, however, it isnot possible to maintain strong force of coupling therebetween.

Also, in the above prior art documents, the putter head is made of asingle material and is formed in a single shape, whereby it is notpossible to learn various hitting sensations.

DISCLOSURE Technical Problem

It is an object of the present disclosure to provide a variable golfputter capable of using various hitting surfaces and providing varioushitting sensations.

The present disclosure is not limited to what has been described above,and other aspects not mentioned herein will be apparent from thefollowing description to one of ordinary skill in the art to which thepresent disclosure pertains.

Technical Solution

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including aputter head coupled to the lower end of a shaft, the putter head havinga head hitting surface, and a hitting member selectively coupled to theputter head, wherein a through hole, through which a fastening boltextends upwards from the bottom surface thereof, is formed in the putterhead so as to be stepped, an incision portion configured to open aportion of the upper surface of the putter head in a hitting directionis formed in the head hitting surface corresponding to the through hole,the hitting member is formed in a golf ball shape and has a hittingsurface formed on the outer circumferential surface thereof, a seatingsurface and a supporting surface supported by an edge of the uppersurface so as to be seated on the upper surface are formed at the bottomsurface of the hitting member so as to be stepped, a screw fasteningrecess, to which the fastening bolt is coupled by fastening, is formedin the seating surface, the hitting member is replaceably coupled to theputter head via the fastening bolt in the state of being seated on thesurface such that a portion of the hitting surface protrudes through theincision portion more than the head hitting surface, the hitting surfaceof the hitting member is constituted by a spherical hitting surfacehaving the same curvature as a golf ball or a planar hitting surface,and, in the case in which the hitting surface is constituted by a planarhitting surface, a plurality of hitting members is provided by area ofthe planar hitting surface and is selectively coupled to the putterhead.

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including aputter head coupled to the lower end of a shaft, the putter head havinga head hitting surface, and a hitting member selectively coupled to theputter head, wherein a through hole, through which a fastening boltextends upwards from the bottom surface thereof, is formed in the putterhead so as to be stepped, an incision portion configured to open aportion of the upper surface of the putter head in a hitting directionis formed in the head hitting surface corresponding to the through hole,a triangular to octagonal coupling protrusion protrudes upwards from theupper surface in which the through hole is formed, the hitting member isformed in a golf ball shape or a polygonal shape, hitting surfaceshaving different shapes and different sizes are formed on the outersurface of the hitting member, a seating surface, which is seated on theupper surface, is formed at the bottom surface of the hitting member, atriangular to octagonal coupling recess is formed in the seating surfacesuch that the coupling protrusion is inserted into and coupled to thecoupling recess when the seating surface is seated on the upper surface,and has coupling surfaces having identical directions to the hittingsurfaces, a screw fastening recess, to which the fastening bolt iscoupled by fastening, is formed in the coupling recess, the couplingprotrusion is coupled to the coupling recess in the state in which anorientation of the hitting member is set such that a hitting surfaceselected from among the hitting surfaces is exposed through the incisionportion, the fastening bolt is coupled to the screw fastening recess ofthe coupling recess through the through hole by fastening, the hittingsurface of the hitting member is constituted by a spherical hittingsurface having identical curvature to a golf ball or a planar hittingsurface, and, in the case in which the hitting surface is constituted bya planar hitting surface, a plurality of hitting members is provided byarea of the planar hitting surface and is selectively coupled to theputter head.

A hitting material made of a material different from the material of thehitting member may be provided integrally at the spherical hittingsurface or the planar hitting surface, and a hitting material recessformed in the spherical hitting surface or the planar hitting surfacemay be filled with the hitting material, or the hitting material may beintegrally formed with the hitting member through insert injectionmolding.

The lower end of the shaft may be formed in a polygonal shape, polygonalcoupling portions, to each of which the lower end of the shaft iscoupled, may be formed at opposite sides of the putter head such thatone of the polygonal coupling portions is selected and used by aleft-handed person or a right-handed person, and the lower end of theshaft and the coupling portion may be coupled to each other via a boltfastened from the bottom surface of the putter head in the state inwhich the lower end of the shaft is fitted in the coupling portion suchthat the coupling angle therebetween is adjusted.

A thickness adjustment recess may be formed around the coupling recessof the hitting member, and the thickness adjustment recess may be formedso as to have different widths such that the hitting surfaces havedifferent thicknesses based on the coupling surfaces, whereby differenthitting sensations and hitting sounds are generated.

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including aputter head having a coupling bar, one end of which is coupled to thelower end of a shaft, the coupling bar extending in a horizontaldirection, and a hitting member having a hitting surface configured tohit a golf ball, the hitting surface being formed on one side thereof,and a spherical or planar practice hitting surface formed on the otherside thereof, the hitting member being coupled to the coupling bar ofthe putter head, wherein the hitting member is formed as a single bodyor is divided into two or five parts having different sizes and shapessuch that the hitting surface and the practice hitting surface areselected, the hitting member being coupled to the coupling bar, thelower end of the shaft is formed in a polygonal shape, a polygonalcoupling portion, to which the lower end of the shaft is coupled, isformed at the putter head, and the lower end of the shaft and thecoupling portion are coupled to each other via a bolt fastened from thebottom surface of the putter head in the state in which the lower end ofthe shaft is fitted in the coupling portion such that the coupling angletherebetween is adjusted.

A hitting material made of a material different from the material of thehitting member may be provided integrally at the hitting surface and thepractice hitting surface, and hitting material recesses formed in thehitting surface and the practice hitting surface may be filled with thehitting material, or the hitting material may be integrally formed withthe hitting member through insert injection molding.

In the case in which the hitting member is divided, the divided hittingmembers may be made of different materials.

In the case in which the practice hitting surface is formed in aspherical shape, a spherical hitting portion having curvature smallerthan curvature of the outer circumferential surface of the hittingmember may be formed at the practice hitting surface, and a sphericalhitting surface may be formed at the spherical hitting portion.

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including aputter head coupled to the lower end of a shaft, wherein the putter headincludes a first hitting member which is formed in a spherical shapehaving a golf ball shape and to which the lower end of the shaft iscoupled, a second hitting member which is formed in a spherical shapehaving a golf ball shape and which is coupled to a side surface of thefirst hitting member in a horizontal direction so as to be located on astraight line together with the first hitting member, a third hittingmember which is formed in a spherical shape having a golf ball shape andwhich is coupled to a side surface of the second hitting member in thehorizontal direction so as to be located on a straight line togetherwith the first hitting member and the second hitting member, and acoupling rod having one end to which a nut is fastened after thecoupling rod extends through the first hitting member, the secondhitting member, and the third hitting member and the other end to whichthe shaft is fastened, the coupling rod being configured to integratethe first hitting member, the second hitting member, and the thirdhitting member, a spherical hitting surface having identical curvatureto a golf ball and planar hitting surfaces are formed at each of thefirst hitting member, the second hitting member, and the third hittingmember, the planar hitting surfaces being formed so as to have differentsizes, the first hitting member, the second hitting member, and thethird hitting member are made of different materials, a hitting materialmade of a material different from materials of the first hitting member,the second hitting member, and the third hitting member is providedintegrally at the spherical hitting surface and the planar hittingsurfaces, and hitting material recesses formed in the spherical hittingsurface and the planar hitting surfaces are filled with the hittingmaterial, or the hitting material is integrally formed with the hittingmember through insert injection molding.

A position changing means configured to change positions of the secondhitting member and the third hitting member, to select the sphericalhitting surface and the planar hitting surfaces, and to change thehitting surfaces depending on whether a user is a right-handed person ora left-handed person may be provided at each of the first hittingmember, the third hitting member, and opposite surfaces of the secondhitting member that face the first hitting member and the third hittingmember, and the position changing means may include a polygonalconnection and coupling member having a predetermined length and apolygonal positioning recess formed in a corresponding one of oppositesurfaces of the first hitting member, the second hitting member, and thethird hitting member such that the connection and coupling member iscoupled to the positioning recess by insertion.

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including ahitting member having one end coupled to the lower end of a shaft, ahitting surface configured to hit a golf ball being formed on one sideof the hitting member, a spherical or planar practice hitting surfacebeing formed on the other side of the hitting member, wherein the lowerend of the shaft is formed in a polygonal shape, a polygonal couplingportion, to which the lower end of the shaft is coupled, is formed atthe hitting member, and the lower end of the shaft and the couplingportion are coupled to each other via a bolt fastened from the bottomsurface of the hitting member in the state in which the lower end of theshaft is fitted in the coupling portion such that the coupling angletherebetween is adjusted.

In accordance with the present disclosure, the above object can beaccomplished by the provision of a variable golf putter including aputter head having a shaft coupling hole, to which the lower end of ashaft is coupled, and a head hitting surface, and a hitting memberselectively coupled to the putter head, wherein a through hole, throughwhich a fastening bolt extends upwards from the bottom surface thereof,is formed in the putter head so as to be stepped, an incision portionconfigured to open a portion of the upper surface of the putter head ina hitting direction is formed in the head hitting surface correspondingto the through hole, a coupling portion is formed around the throughhole, a hitting surface is formed at one or each of outer surfaces ofthe hitting member, a coupling recess, to which the coupling portion iscoupled by insertion, is formed in the bottom surface of the hittingmember so as to be open downwards, a screw fastening recess is formed inthe bottom surface of the coupling recess, the fastening bolt isfastened to the screw fastening recess through the through hole in thestate in which the coupling portion is inserted into and coupled to thecoupling recess such that the hitting surface protrudes through theincision portion more than the head hitting surface or coincides withthe head hitting surface, whereby the hitting member is replaceablycoupled to the putter head, and a hitting sound generation recessconfigured to generate a hitting sound when a golf ball is hit by allthe hitting surface or a region of the hitting surface corresponding toa positive hitting point is formed in the hitting member.

The hitting sound generation recess may be formed in a regioncorresponding to the hitting surface or a region of the hitting surfacecorresponding to the positive hitting point so as to be open toward thebottom, the side, or the top of the hitting member or toward thecoupling recess.

The hitting sound generation recess may be filled with a metal materialor a synthetic resin material different from a material of the hittingmember, the metal material or the synthetic resin material may becoupled to the hitting sound generation recess by insertion, or themetal material or the synthetic resin material may be integrally formedwith the hitting member through insert injection molding.

The hitting member may be formed in the shape of a sphere, a hemisphere,or a combination of a polygon and a sphere, and a mark configured toindicate the hitting direction may be formed on the outercircumferential surface of the hitting member in the form of a pluralityof recesses or a line.

A decorative member for decoration may be provided at the upper surfaceof the hitting member, and a portion of the decorative member may becoupled to the hitting member by insertion, or a fastening portionprovided at the decorative member may be coupled to a screw hole formedin the upper surface of the hitting member by fastening.

Shaft coupling holes of the putter head may be formed in opposite sidesof the putter head such that a right-handed person or a left-handedperson selects one of the shaft coupling holes and couples the shaft tothe selected shaft coupling hole.

In the case in which the hitting member is formed in the shape of asphere, a hemisphere, or a combination of a polygon and a sphere, thehitting surface is formed at the outer circumference of the hittingmember, and the distance between the center of the hitting member and ahitting position is preset, a hemispherical auxiliary member may beformed at the hitting surface so as to protrude and an auxiliary hittingsurface may be formed at the hemispherical auxiliary member such thatthe area of the hitting surface is increased or decreased.

Advantageous Effects

According to the present disclosure, the hitting member has varioushitting surfaces, whereby it is possible to putt and to perform puttingpractice in various manners. In addition, a hitting material made of amaterial different from the material of the hitting member is formedintegrally with the hitting member, whereby it is possible to providevarious hitting sensations and thus to efficiently perform puttingpractice.

In addition, a hitting sound generation recess is formed in the hittingmember such that a bright hitting sound is generated when a golf ball ishit at a positive hitting point of the hitting surface, whereby it ispossible to easily recognize that correct hitting has been performed.

DESCRIPTION OF DRAWINGS

FIGS. 1 and 2 are views showing a conventional golf putter for practice.

FIG. 3 is an exploded perspective view showing a variable golf putteraccording to a first embodiment of the present disclosure.

FIGS. 4, 5, and 6 are perspective views showing other embodiments of ahitting member shown in FIG. 3.

FIG. 7 is a sectional view showing a coupling state of the golf putterfor practice shown in FIG. 3.

FIG. 8 is a plan view showing a use state of the golf putter forpractice shown in FIG. 3.

FIGS. 9, 10, 11, and 12 are views showing a variable golf putteraccording to a second embodiment of the present disclosure.

FIG. 13 is a schematic plan view showing a use state of the variablegolf putter shown in FIGS. 7 to 10.

FIG. 14 is a perspective view showing a variable golf putter accordingto a third embodiment of the present disclosure.

FIG. 15 is an exploded perspective view showing a variable golf putteraccording to a fourth embodiment of the present disclosure.

FIG. 16 is a sectional view showing a coupling state of the variablegolf putter shown in FIG. 15.

FIG. 17 is an exploded perspective view showing another embodiment ofthe variable golf putter shown in FIG. 15.

FIGS. 18, 19, and 20 are views showing other embodiments of a hittingmember shown in FIG. 17.

FIG. 21 is an exploded perspective view showing a variable golf putteraccording to a fifth embodiment of the present disclosure.

FIG. 22 is a sectional view showing a coupling state of the variablegolf putter shown in FIG. 21.

FIGS. 23 and 24 are plan views showing a use state of the variable golfputter shown in FIG. 21.

FIG. 25 is an exploded perspective view showing a variable golf putteraccording to a sixth embodiment of the present disclosure.

FIG. 26 is a perspective view showing a coupling state of the variablegolf putter shown in FIG. 25.

FIG. 27 is a sectional view taken along line A-A of FIG. 26.

FIG. 28 is a bottom view showing a hitting member shown in FIG. 26.

* Description of reference symbols * 10: Shaft 20, 200: Putter heads 21:Coupling portion 22: Through hole 23: Upper surface 23A: Edge 24:Hitting surface of putter head 25: Seating recess 26: Incision portion27: Coupling protrusion 30: Hitting member 31: Hitting material recess32: Seating surface 32A: Supporting surface 32B: Screw fastening recess32C: Coupling recess 32C-1: Coupling surface 33: Coupling portion 34,340: Hitting surfaces 34-1: Practice hitting surface 34A, 34-2, 320:Spherical hitting 34B, 340: Planar hitting surfaces surfaces 35:Insertion recess 37: Thickness adjustment recess 39: Hitting material40: Fastening bolt 210: Coupling bar 300A: First hitting member 300B:Second hitting member 300C: Third hitting member 400: Coupling rod 500:Position changing means 510, 510A, 510B: Connection and coupling members520: Positioning recess

BEST MODE

The present disclosure provides a variable golf putter including aputter head coupled to the lower end of a shaft, the putter head havinga head hitting surface, and a hitting member selectively coupled to theputter head, wherein a through hole, through which a fastening boltextends upwards from the bottom surface thereof, is formed in the putterhead so as to be stepped, an incision portion configured to open aportion of the upper surface of the putter head in a hitting directionis formed in the head hitting surface corresponding to the through hole,the hitting member is formed in a golf ball shape and has a hittingsurface formed on the outer circumferential surface thereof, a seatingsurface and a supporting surface supported by an edge of the uppersurface so as to be seated on the upper surface are formed at the bottomsurface of the hitting member so as to be stepped, a screw fasteningrecess, to which the fastening bolt is coupled by fastening, is formedin the seating surface, the hitting member is replaceably coupled to theputter head via the fastening bolt in the state of being seated on thesurface such that a portion of the hitting surface protrudes through theincision portion more than the head hitting surface, the hitting surfaceof the hitting member is constituted by a spherical hitting surfacehaving the same curvature as a golf ball or a planar hitting surface,and, in the case in which the hitting surface is constituted by a planarhitting surface, a plurality of hitting members is provided by area ofthe planar hitting surface and is selectively coupled to the putterhead. Consequently, a user may select the hitting surface and may thencouple the hitting member to the putter head, whereby various hittingsensations may be provided to the user.

MODE FOR INVENTION

Reference will now be made in detail to the preferred embodiments of thepresent disclosure, examples of which are illustrated in theaccompanying drawings. In the following description of the presentdisclosure, however, a detailed description of known functions andconfigurations incorporated herein will be omitted when it may obscurethe subject matter of the present disclosure.

Among the accompanying drawings, FIG. 3 is an exploded perspective viewshowing a variable golf putter according to a first embodiment of thepresent disclosure, FIGS. 4, 5, and 6 are perspective views showingother embodiments of a hitting member shown in FIG. 3, FIG. 7 is asectional view showing a coupling state of the golf putter for practiceshown in FIG. 3, and FIG. 8 is a plan view showing a use state of thegolf putter for practice shown in FIG. 3.

As shown in FIGS. 3 to 8, the variable golf putter according to thefirst embodiment of the present disclosure includes a putter head 20 anda hitting member 30 selectively coupled to the putter head 20.

The putter head 20 is coupled to the lower end 12 of a shaft 10, and hasa head hitting surface 24 formed in a hitting direction.

A through hole 22, through which a fastening bolt 40 extends upwardsfrom the bottom surface thereof, is formed in the putter head 20 so asto be stepped, and an incision portion 26 configured to open a portionof the upper surface 23 of the putter head 20 in the hitting directionis formed in the central region of the head hitting surface 24corresponding to the through hole 22.

The hitting member 30 is formed in a spherical shape, such as a golfball shape, and has a hitting surface 34 formed on the outercircumferential surface thereof. A seating surface 32 and a supportingsurface 32A supported by the edge of the upper surface 23 of the putterhead 20 so as to be seated on the upper surface 23 are formed at thebottom surface of the hitting member 30 so as to be stepped. A screwfastening recess 32B, to which the fastening bolt 40 is coupled byfastening, is formed in the seating surface 32.

The hitting member 30 is replaceably coupled to the putter head 20 viathe fastening bolt 40 in the state of being seated on the surface 23such that a portion of the hitting surface 34 of the hitting member 30protrudes through the incision portion 26 more than the head hittingsurface 23.

The hitting surface 34 of the hitting member 30 is constituted by aspherical hitting surface 34A having the same curvature as a golf ballor a planar hitting surface 34B. In the case in which the hittingsurface of the hitting member is constituted by a planar hitting surface34B, a plurality of hitting members 30 is provided by area of the planarhitting surface 34B, and is selectively coupled to the putter head 20. Ahitting material 39 made of a material different from the material ofthe hitting member 30 is provided integrally at the spherical hittingsurface 34A or the planar hitting surface 34B.

This will be described in more detail.

The through hole 22, through which the fastening bolt 40 extends upwardsfrom the bottom surface thereof, is formed in the putter head 20 so asto be stepped. The incision portion 26 configured to open a portion ofthe upper surface 23 of the putter head 20 in the hitting direction isformed in the central region of the head hitting surface 24corresponding to the through hole 22, i.e. equivalent to the region inwhich the through hole 22 is formed, as shown in FIG. 3. The incisionportion 26 is configured to expose a portion of the hitting surface 34forwards (in the hitting direction) when the hitting member 30 iscoupled to the upper surface 23 of the putter head 20.

The reason that the through hole 22 is formed so as to be stepped isthat it may be necessary to prevent a head portion of the fastening bolt40 from protruding outwards from the bottom surface of the putter head20 when the fastening bolt 40 is coupled to the hitting member 30through the through hole 22. Preferably, the through hole 22 and theincision portion 26 are formed in the middle (the central region) of theputter head 20.

The hitting member 30 is configured to be selectively coupled to orseparated from the putter head 20. The hitting member 30 is formed so asto have the same shape as a golf ball and to have a size equal orsimilar to the size of the golf ball, as shown in FIG. 3. The sphericalor planar hitting surface 34 is formed on the outer circumferentialsurface of the hitting member 30. The seating surface 32, on which theupper surface 23 of the putter head 20 is seated, is formed on thebottom surface of the hitting member 30, and the supporting surface 32A,which is supported by the edge 23A of the upper surface 23 when theseating surface 32 is seated on the upper surface 23, is formed at oneside of the seating surface 32 so as to be stepped. This structure isconfigured to stably absorb impact generated when hitting a golf ballusing the hitting surface 34 by the provision of the supporting surface32A. In addition, the screw fastening recess 32B, to which the fasteningbolt 40 is coupled by fastening, is formed in the seating surface 32,and has a female screw thread formed therein.

The hitting member 30 configured as described above is replaceablycoupled to the putter head 20 via the fastening bolt 40 in the state ofbeing seated on the surface 23 such that a portion of the hittingsurface 34 of the hitting member 30 protrudes through the incisionportion 26 more than the head hitting surface 23. In addition, the headportion of the fastening bolt 40 is seated in the stepped through hole33, and therefore the head portion is prevented from protruding outwardsfrom the bottom surface of the putter head 20 when the fastening bolt 40is coupled to the screw fastening recess 32B from the bottom surface ofthe putter head 20 through the through hole 22.

The hitting surface 34 of the hitting member 30 is constituted by aspherical hitting surface 34A having the same curvature as a golf ballor a planar hitting surface 34B. In the case in which the hittingsurface of the hitting member is constituted by a planar hitting surface34B, a plurality of hitting members 30 is preferably provided by area ofthe planar hitting surface 34B. That is, in the case in which aplurality of hitting members 30 having different sizes of planar hittingsurfaces 34B is provided, a user may select a hitting member 30 having adesired size of a planar hitting surface 34B, may couple the selectedhitting member to the putter head 20, and may use the putter head.

A hitting material 39 made of a material different from the material ofthe hitting member 30 is provided integrally at the spherical hittingsurface 34A or the planar hitting surface 34B of the hitting member 30.That is, as shown in FIGS. 5, 6, and 7, a plurality of hitting materialrecesses each having a predetermined depth is formed in the sphericalhitting surface 34A or the planar hitting surface 34B, and the hittingmaterial recesses 31 are filled with a hitting material 39 made of amaterial different from the material of the hitting member 30 so as tobe integrated, or the hitting material is integrally formed with thehitting member 30 through insert injection molding. For example, in thecase in which the hitting member 30 is made of iron, the hittingmaterial recesses 31 are filled with a material other than iron, such ascopper or aluminum, or integration between the hitting member and thehitting material is achieved through insert injection molding.

As described above, the hitting material recesses 31 are formed in thespherical hitting surface 34A or the planar hitting surface 34B, and ahitting material 39 made of a material different from the material ofthe hitting member 30 is provided integrally in the hitting materialrecesses 31, whereby it is possible to provide various hittingsensations and hitting sounds to a user who putts.

In this embodiment, the hitting material recesses 31 are filled with thehitting material 39, or the hitting material is integrally formed withthe hitting member 30 through insert injection molding. However, thepresent disclosure is not limited thereto. As shown in FIG. 18,protrusions 31-1 may be formed on the bottoms of the hitting materialrecesses 31, and gaps between the protrusions 31-1, i.e. the hittingmaterial recesses 31, may be filled with the hitting material 39 so asto be integrated, or the hitting material may be integrally formed withthe hitting member through insert injection molding.

Meanwhile, the variable golf putter according to this embodiment has astructure in which the lower end of the shaft 10 is formed in apolygonal shape and a polygonal coupling portion 21, to which the lowerend 12 of the shaft 10 is coupled, is formed at the putter head 20. Thelower end 12 and the coupling portion 21 may be formed so as to have asawtooth structure (spline coupling), rather than the polygonalstructure, so as to be coupled with each other. The lower end 12 of theshaft 10 and the coupling portion 21 are coupled to each other via abolt (not shown) fastened to the lower end 12 of the shaft 10 throughthe bottom surface of the putter head 20 or the side surface of theupper end of the putter head at which the coupling portion 21 is formedin the state in which the lower end 12 is fitted in the coupling portion21 such that the coupling angle therebetween is adjusted. Of course, thelower end 12 and the coupling portion 21 may be securely coupled to eachother via a separate fixing means in the state in which the lower end isfitted in the coupling portion.

Since each of the lower end 12 of the shaft 10 and the coupling portion21 is formed so as to have a polygonal structure or a sawtoothstructure, as described above, it is possible to adjust the couplingangle of the putter head 20 having the hitting member 30 coupled theretorelative to the shaft 10, as shown in FIG. 6. In the case in which eachof the lower end 12 and the coupling portion 21 has a microscalesawtooth structure, it is possible to adjust the angle of the putterhead 20 in microscale.

The operation of the variable golf putter according to the firstembodiment of the present disclosure configured as described above willbe described.

A user selects a hitting member 30 having one of different hittingsurfaces 34, e.g. a hitting member 30 having a spherical hitting surface34A, and couples the selected hitting member to the upper surface 23 ofthe putter head 20, or selects a hitting member 30 having a planarhitting surface 34B, and couples the selected hitting member to theupper surface 23 of the putter head 20. That is, the user selects ahitting member 30 having a desired hitting surface 34, and couples theselected hitting member to the putter head 20 using the fastening bolt40.

Subsequently, as shown in FIG. 8, the user may perform putting practiceusing the hitting member 30, since the hitting surface 34 protrudes inthe hitting direction through the incision portion 26 more than thehitting surface 24 of the putter head 20 when the hitting member 30 iscoupled to the putter head 20.

The user may couple the hitting member 30 having the spherical hittingsurface 34A to the putter head 20, or may select the hitting member 30having the planar hitting surface 34B and may couple the selectedhitting member to the putter head 20, whereby it is possible toefficiently perform putting practice using various hitting surfaces.

In addition, since the seating surface of the hitting member 30 isseated on the upper surface 23 of the putter head 20, the supportingsurface 32A is supported by the edge of the upper surface 23, and thefastening bolt 40 is fastened to the coupling recess 32V through thethrough hole 22, a coupling state between the hitting member 30 and theputter hand 20 is securely maintained. Furthermore, the hitting member30 does not move freely at the time of putting practice, and, since thesupporting surface 32A is supported by the edge 23A of the upper surface23, stable hitting is possible without free movement at the time ofhitting a golf ball.

In particular, since a hitting material 39 made of a different materialthan the hitting member 30 is provided integrally at the hitting surface34, it is possible to provide various hitting sensations and hittingsounds to the user.

Among the accompanying drawings, FIGS. 9 to 12 are views showing avariable golf putter according to a second embodiment of the presentdisclosure. FIG. 13 is a schematic plan view showing a use state of thevariable golf putter shown in FIGS. 9 to 12.

As shown in FIGS. 9 to 13, the variable golf putter according to thesecond embodiment includes a putter head 20 coupled to the lower end 12of a shaft 10, the putter head having a head hitting surface 24, and ahitting member 30 selectively coupled to the putter head 20.

A through hole 22, through which a fastening bolt 40 extends upwardsfrom the bottom surface thereof, is formed in the putter head 20 so asto be stepped. An incision portion 26 configured to open a portion ofthe upper surface 23 of the putter head 20 in the hitting direction isformed in the central region of the head hitting surface 24corresponding to the through hole 22, i.e. equivalent to the region inwhich the through hole 22 is formed. A triangular to octagonal couplingprotrusion 27 protrudes upwards from the upper surface 23 in which thethrough hole 22 is formed.

The hitting member 30 is formed in a golf ball shape or a polygonalshape, and hitting surfaces 34 having different shapes and differentsizes are formed on the outer surface of the hitting member. A seatingsurface 32, which is seated on the upper surface 23, is formed at thebottom surface of the hitting member. A triangular to octagonal couplingrecess 32C is formed in the seating surface 32 such that the couplingprotrusion 27 is inserted into and coupled to the coupling recess whenthe seating surface is seated on the upper surface 23, and has couplingsurfaces 32C-1 having the same directions as the hitting surfaces 34. Ascrew fastening recess 32B, to which the fastening bolt 40 is coupled byfastening when the coupling protrusion 27 is inserted into the couplingrecess, is formed in the coupling recess 32C.

The coupling protrusion 27 is inserted into and coupled to the couplingrecess 32C in the state in which the orientation of the hitting member30 is set such that a hitting surface 34 selected from among the hittingsurfaces 34 of the hitting member 30 is exposed through the incisionportion 26, and the fastening bolt 40 is fastened to the screw fasteningrecess 32B of the coupling recess 32C through the through hole 22. Asthe result of this procedure, the hitting member 30 is coupled to theputter head 20.

The hitting surface 34 of the hitting member 30 is constituted by aspherical hitting surface 34A having the same curvature as a golf ballor a planar hitting surface 34B. In the case in which the hittingsurface of the hitting member is constituted by a planar hitting surface34B, a plurality of hitting members 30 is provided by size of the planarhitting surface 34B, and is selectively coupled to the putter head 20.This embodiment is identical to the previous embodiment except that ahitting material 39 made of a material different from the material ofthe hitting member 30 is provided integrally at the spherical hittingsurface 34A or the planar hitting surface 34B.

In this embodiment, the coupling protrusion 27 is described as beingformed in a quadrangular shape. However, the present disclosure is notlimited thereto, and the coupling protrusion may be formed in any one oftriangular to octagonal shapes.

Since the coupling protrusion 27 is formed on the putter head 20, thecoupling recess 32C is formed in the hitting member 30, and the hittingmember 30 is coupled to the putter head via the coupling protrusion 27,as described above, it is possible to more stably maintain a couplingstate between the hitting member and the putter head 20.

In the case in which the user selects the spherical hitting surface 34A,from between the spherical hitting surface 34A and the planar hittingsurface 34B of the hitting member 30, the coupling protrusion 27 isinserted into the coupling recess 32C of the hitting member 30 in such amanner that the coupling surface 32C-1 of the coupling recess 32Ccoinciding with the spherical hitting surface 34A faces the incisionportion 26 such that the spherical hitting surface 34A is exposedthrough the incision portion 26, and then fastening is performed usingthe fastening bolt 40, whereby it is possible to achieve secure couplingand to select the hitting surface 34.

In other words, since the polygonal coupling recess 32C having theplurality of coupling surfaces 32C-1 having the same directions as thehitting surfaces 34 is formed in the hitting member 30 having theplurality of hitting surfaces 34 formed thereon, and the polygonalcoupling protrusion 27 is formed on the upper surface 23 of the putterhead 20, the user may select a preferred hitting surface 34, from amongthe plurality of hitting surfaces 34, and may couple the couplingprotrusion 27 to the coupling recess 32C in such a manner that thecoupling surface 32C-1 coinciding with the selected hitting surface 34faces the incision portion 26 such that the selected hitting surface 34is exposed through the incision portion 26. Consequently, it is possiblefor the user to perform hitting practice using the selected hittingsurface 34.

Since a plurality of hitting surfaces 34 is formed on a single hittingmember 30 and each hitting surface 34 is configured to have a simplestructure and to be selectively used, as described above, it is possiblefor the user to select and use one of the hitting surfaces 34 havingvarious shapes and sizes.

In addition, the size of the hitting surface 34 may be selected, andthen the hitting member 30 may be coupled to the putter head 20, wherebyit is possible to learn various hitting sensations.

Meanwhile, hitting material recesses 31 are formed in the hittingsurface 34, a hitting material 39 made of a material different from thematerial of the hitting member 30 is provided integrally in the hittingmaterial recesses 31, as in the previous embodiment. When the userperforms hitting, therefore, it is possible to provide a hittingsensation and hitting sound other than when hitting is performed using ahitting member 30 made of a single kind of material.

Among the accompanying drawings, FIGS. 11 and 13 show another embodimentof the variable golf putter according to the second embodiment of thepresent disclosure shown in FIGS. 9 and 10.

As shown in FIGS. 9 and 13, a hitting member 30 according to anotherembodiment is identical to the hitting member according to the previousembodiment except that a thickness adjustment recess 37 configured tomake the thicknesses of the hitting surfaces 34 different from eachother is formed around the coupling recess 32C. That is, the thicknessadjustment recess 37 is formed around the coupling recess 32C of thehitting member 30, and the thickness adjustment recess 37 is formed soas to have different widths W such that the hitting surfaces 34 havedifferent thicknesses based on the coupling surfaces 32C-1. Here, thethickness of each of the hitting surfaces 34 means the thickness betweeneach of the hitting surfaces 34 and a corresponding one of the couplingsurfaces 32C-1.

As described above, the thickness adjustment recess 37 is formed so asto have different widths W such that the hitting surfaces 34 havedifferent thicknesses. When the user selects one of the hitting surfaces34 and hits a golf ball, therefore, it is possible to provide varioushitting sensations and hitting sounds depending on the thickness of thehitting surface 34.

Among the accompanying drawings, FIG. 12 shows yet another embodiment ofthe variable golf putters according to the first to second embodimentsof the present disclosure shown in FIGS. 3 to 9. As shown in FIG. 12,the variable golf putter has a seating recess 25 formed in the middle ofthe putter head 20 so as to be open in the hitting direction and in theupward direction, the seating recess 25 having a through hole 22 formedtherethrough. This embodiment is identical to the previous embodimentsexcept that, in the state in which a hitting member 30 having differentshapes and sizes of hitting surfaces 34 is inserted into and seated inthe seating recess 25, the hitting member 30 is integrally coupled tothe putter head 20 via a fastening bolt 40 fastened to the bottomsurface of the hitting member 30 through the through hole 22 from below.Here, the seating recess 25 is formed so as to have the same shape asthe hitting member 30 such that the hitting member 30 is inserted intoand stably seated in the seating recess.

Since the hitting member 30 is inserted into the seating recess 25 ofthe putter head 20 and is coupled to the putter head via the fasteningbolt 40, as described above, it is possible to maintain a stablecoupling state between the hitting member 30 and the putter head 20.

Among the accompanying drawings, FIG. 14 is a perspective view showing avariable golf putter according to a third embodiment of the presentdisclosure.

As shown in FIG. 14, the variable golf putter according to the thirdembodiment is identical to the variable golf putters according to theprevious embodiments except that the variable golf putter includes ahitting member 30 having one end coupled to the lower end 12 of a shaft10, wherein a hitting surface 34 configured to hit a golf ball is formedon one side of the hitting member, and a spherical or planar practicehitting surface 34-1 is formed on the other side of the hitting member.That is, the variable golf putter according to the third embodiment hasa structure in which the lower end 12 of the shaft 10 is coupled to oneend of the hitting member 30 having the hitting surface 34 and thepractice hitting surface 34-1 formed on opposite sides thereof.

In addition, the lower end 12 of the shaft 10 is formed in a polygonalshape, and a polygonal coupling portion 33, to which the lower end 12 ofthe shaft 10 is coupled, is formed at the hitting member 30. The lowerend 12 of the shaft 10 and the coupling portion 33 are coupled to eachother through fastening using a bolt 40A fastened from the bottomsurface of the hitting member 30 in the state in which the lower end 12of the shaft 10 is fitted in the coupling portion 33 such that thecoupling angle therebetween is adjusted.

Meanwhile, although not shown in the figure, the hitting material 39described above may be provided in the hitting surface 34 or thepractice hitting surface 34-1.

Since the hitting member 30 is directly coupled to the shaft 10, asdescribed above, it is not necessary to provide a separate putter head20. In addition, since the hitting surface 34 is formed on one surfaceof the hitting member 30 and the practice hitting surface 34-1 is formedon the other surface of the hitting member, as described above, it ispossible to provide convenience in which the user may hit a golf ball(putt) using the hitting surface 34 and may perform hitting practiceusing the practice hitting surface 34-1.

Among the accompanying drawings, FIG. 15 is an exploded perspective viewshowing a variable golf putter according to a fourth embodiment of thepresent disclosure, and FIG. 16 is a sectional view showing a couplingstate of the variable golf putter shown in FIG. 15.

As shown in FIGS. 15 and 16, the variable golf putter according to thefourth embodiment includes a putter head 20 having a coupling bar 210,one end of which is coupled to the lower end 12 of a shaft 10, thecoupling bar extending in a horizontal direction, and a hitting member30 having a hitting surface 34 configured to hit a golf ball, thehitting surface being formed on one side thereof, and a spherical orplanar practice hitting surface 34-1 formed on the other side thereof,the hitting member being coupled to the putter head 20 and having apolygonal coupling portion 33. The hitting member 30 is formed as asingle body, and is coupled to the coupling bar 210 of the putter head20. In addition, the lower end 12 of the shaft 10 is formed in apolygonal shape and is inserted into the coupling portion 33 of thehitting member 30, and a fastening bolt 40A, which is inserted into afastening bolt through-hole 21A formed in the putter head 20, isfastened to a screw hole (not shown) formed in the inner circumferentialsurface of the lower end 12 fitted in the coupling portion 33. As aresult, the shaft 10, the hitting member 30, and the putter head 20 areintegrated. Of course, the lower end 12 and the putter head 20 may becoupled to each other through a fixing structure other than thefastening bolt 40A.

Meanwhile, in this embodiment, it is possible to adjust the couplingangle between the hitting member 30 and the shaft 10 based on thecoupling angle between the lower end 12 and the coupling portion 33.That is, the angle at which the lower end 12 of the shaft 10 is insertedinto the polygonal coupling portion 33 is adjusted, and then the bolt40A is fastened to the lower end 12 from the lower surface of the putterhead 20, whereby the coupling angle between the hitting member and theshaft 10 is set.

This embodiment is identical to the previous embodiments except for thecoupling structure described above.

Here, a hitting material 39 made of a material different from thematerial of the hitting member 30 may be provided in the hitting surface34 and the practice hitting surface 34-1, as previously described.

In addition, an insertion recess 35, into which the coupling bar 210 isinserted, is formed in the bottom surface of the hitting member 30, andthe fastening bolt 40 is fastened to a screw hole formed in theinsertion recess 35 of the hitting member 30 through the coupling bar210 from the lower surface thereof in the state in which the couplingbar 210 is inserted in the insertion recess 35, whereby the hittingmember 30 and the coupling bar 210 may be securely coupled to eachother.

In addition, as previously described, the hitting member 30 is coupledto the coupling bar 210 of the putter head 20 through a fittingstructure and a fastening structure, whereby it is possible to selectand use various shapes and sizes of hitting members 30. Furthermore,since the hitting surface 34 is formed on one surface of the hittingmember 30 and the practice hitting surface 34-1 is formed on the othersurface of the hitting member, it is possible to provide convenience inwhich the user may hit (putt) a golf ball using the hitting surface 34and may perform hitting practice using the practice hitting surface34-1.

Among the accompanying drawings, FIG. 17 is an exploded perspective viewshowing another embodiment of the variable golf putter shown in FIG. 15.

As shown in FIG. 17, another embodiment of the variable golf puttershown in FIGS. 15 and 16 is identical to the fourth embodiment describedabove except that two to five hitting members 30 having different sizesand shapes are individually formed and are coupled to the coupling bar210 such that the hitting surface 34 and the practice hitting surface34-1 are selected. In this case, it is natural that insertion recesses35, into which the coupling bar 210 is inserted so as to be coupledthereto, are formed in the bottom surfaces of the individual hittingmembers 30.

In the case in which the hitting members 30 are individually formed, asdescribed above, the individual hitting members 30 may be made ofdifferent materials. Since the hitting members 30 are made of differentmaterials, as described above, it is possible for the user to select ahitting member 30 made of a material that provides a desired hittingsensation and to perform hitting practice.

Since the hitting members 30 are individually formed so as to havedifferent sizes and shapes, as shown in FIG. 17, it is possible toprovide convenience in which the user may select a hitting member 30according to personal preference and may perform hitting (putting)practice.

Meanwhile, as shown in FIGS. 18, 19, and 20, in the hitting member 30according to the fourth embodiment described above, a hitting material39 made of a material different from the material of the hitting member30 may be provided at the hitting surface 34.

For example, in the case in which the hitting member 30 is made of iron,the hitting material 39 may be made of copper or aluminum, whereby it ispossible to provide various hitting sensations to the user. That is,hitting material recesses 31 are formed in the hitting surface 34 andthe practice hitting surface 34-1, and the hitting material recesses 31are filled with a metal material or a hard synthetic resin materialdifferent from the material of the hitting member 30, or the hittingmaterial is integrally formed with the hitting member through insertinjection molding. In particular, as shown in FIGS. 18 and 19,protrusions 31-1 may be formed on the bottoms of the hitting materialrecesses 31 formed in the hitting surface 34, and gaps between theprotrusions 31-1, i.e. the hitting material recesses 31, may be filledwith the hitting material 39 so as to be integrated, or the hittingmaterial may be integrally formed with the hitting member through insertinjection molding.

As described above, the hitting material 39 is provided integrally atthe hitting surface 34 and the practice hitting surface 34-1. When theuser hits a golf ball using the hitting surface having the hittingmaterial 39, therefore, it is possible to obtain a hitting sensation andhitting sound different from when the user hits the golf ball using ahitting surface 34 made of only a single metal. According to thisembodiment, it is possible to provide various hitting sensations andhitting sounds to the user.

Meanwhile, among the accompanying drawings, FIG. 20 is a view showinganother embodiment of the hitting member shown in FIG. 17.

As shown in FIG. 20, this embodiment is identical to the previousembodiments except that, in the case in which the hitting member 30 isformed so as to have a spherical shape (a spherical surface) and apractice hitting surface 34 is formed at the outer circumference 34-3 ofthe spherical shape, a spherical hitting portion 34-2 having curvaturesmaller than the curvature of the outer circumference 34-3 of thehitting member 30 is formed at the practice hitting surface 34, and anauxiliary hitting surface 34-5 is formed at the spherical hittingportion 34-2.

That is, in the case in which the spherical hitting portion 34-2, whichhas small curvature, is formed at the practice hitting surface 34 of theouter circumference 34-3 of the hitting member 30, and the auxiliaryhitting surface 34-5 is formed at the spherical hitting portion 34-2,whereby the distance between the center of the insertion recess 35 andan imaginary hitting surface is preset, it is possible to increase ordecrease the area of the auxiliary hitting surface 34-5. That is, in thecase in which the distance between the center of the insertion recess 35and the imaginary hitting surface is preset, it is possible to form ahitting member 30 configured such that the area of the hitting surfaceis increased or to form a hitting member 30 configured such that thearea of the hitting surface is decreased without changing the distancebetween the center of the insertion recess 35 and the imaginary hittingsurface.

In other words, in the case in which the distance between the center ofthe insertion recess 35 and the imaginary hitting surface is preset atthe time of manufacture of the hitting member 30, the spherical hittingportion 34-2 having curvature smaller than the curvature of the hittingmember 30 is formed at the practice hitting surface 34 so as to beprotrude, and the auxiliary hitting surface 34-5 is formed at thehitting region of the spherical hitting portion 34-2, as shown in FIG.20. At this time, it is possible to increase or decrease the area of theauxiliary hitting surface 34-5 by increasing or decreasing the curvatureof the spherical hitting portion 34-2. In the above structure, it ispossible to obtain a hitting member 30 configured such that theauxiliary hitting surface 34-5 has different areas without changing thedistance between the center of the insertion recess 35 and the imaginaryhitting surface. This structure is shown in FIG. 20.

In addition, a decorative member J made of a jewel or a quasi-jewel,such as sapphire or cubic zirconia, in order to increase the value ofthe hitting member 30 and to improve visibility of the hitting member,may be provided at the upper surface of the hitting member 30. Thedecorative member J may have a screw portion configured to be fastenedto a screw hole formed in the hitting member 30 such that the decorativemember is coupled to the hitting member 30 through a fasteningstructure, or may be coupled to the hitting member through a separatecoupling structure.

Among the accompanying drawings, FIG. 21 is an exploded perspective viewshowing a variable golf putter according to a fifth embodiment of thepresent disclosure, FIG. 22 is a sectional view showing a coupling stateof the variable golf putter shown in FIG. 21, and FIG. 23 is a plan viewshowing a use state of the variable golf putter shown in FIG. 21.

As shown in FIGS. 21 to 23, the variable golf putter according to thefifth embodiment is identical to the variable golf putters according tothe previous embodiments described above except for the followingconstruction.

That is, the variable golf putter includes a putter head 200 coupled tothe lower end 12 of a shaft 10, wherein the putter head 200 includes afirst hitting member 300A which is formed in a spherical shape, such asa golf ball shape, and to which the lower end of the shaft 10 iscoupled, a second hitting member 300B which is formed in a sphericalshape, such as a golf ball shape, and which is coupled to the sidesurface of the first hitting member 300A in a horizontal direction so asto be located on a straight line together with the first hitting member300A, a third hitting member 300C which is formed in a spherical shape,such as a golf ball shape, and which is coupled to the side surface ofthe second hitting member 300B in the horizontal direction so as to belocated on a straight line together with the first hitting member 300Aand the second hitting member 300B, and a coupling rod 400 having oneend to which a nut is fastened after the coupling rod extends throughthe first hitting member 300A, the second hitting member 300B, and thethird hitting member 300C and the other end to which the shaft 10 isfastened, the coupling rod being configured to integrate the firsthitting member 300A, the second hitting member 300B, and the thirdhitting member 300C.

In addition, a spherical hitting surface 320 having the same curvatureas a golf ball and planar hitting surfaces 340 are formed at each of thefirst hitting member 300A, the second hitting member 300B, and the thirdhitting member 300C, wherein the planar hitting surfaces 340 are formedso as to have different sizes. That is, the outer circumferentialsurface of each of the hitting members 300A, 300B, and 300C is dividedinto four parts such that one of the parts constitutes a sphericalhitting surface 320 and the other parts constitute planar hittingsurfaces 340 having different sizes. The reason that a single hittingmember is formed so as to have a plurality of different hitting surfacesas described above is that it is necessary to allow a user to select anduse hitting surfaces having various sizes and shapes (a spherical shapeor a planar shape).

The first hitting member 300A, the second hitting member 300B, and thethird hitting member 300C are made of different materials, and a hittingmaterial 390 made of a material different from the materials of thefirst hitting member 300A, the second hitting member 300B, and the thirdhitting member 300C is provided integrally at the spherical hittingsurface 320 and the planar hitting surfaces 340, wherein hittingmaterial recesses 310 formed in the spherical hitting surface 320 andthe planar hitting surfaces 340 are filled with the hitting material390, or the hitting material is integrally formed with the hittingmembers through insert injection molding.

In addition, a position changing means 500 configured to changepositions of the second hitting member 300B and the third hitting member300C, to select the spherical hitting surface 320 and the planar hittingsurfaces 340, and to change the hitting surfaces 320 and 340 dependingon whether the user is a right-handed person or a left-handed person isprovided at each of the first hitting member 300A, the third hittingmember 300C, and opposite surfaces of the second hitting member 300Bthat face the first hitting member 300A and the third hitting member300C.

The position changing means 500 includes a triangular to octagonalconnection and coupling member 510 having a predetermined length and atriangular to octagonal positioning recess 520 formed in a correspondingone of the opposite surfaces of the first hitting member 300A, thesecond hitting member 300B, and the third hitting member 300C such thatthe connection and coupling member 510 is coupled to the positioningrecess 520 by insertion.

In this embodiment, the polygonal connection and coupling member 510 andthe polygonal positioning recess 520 are described as being formed so asto have a quadrangular shape, and the minimum number of connection andcoupling members 510 is two. The reason for this is that other hittingmembers are connected and coupled to opposite surfaces of a middlehitting member.

The first hitting member 300A, the second hitting member 300B, and thethird hitting member 300C may be made of the same material as a golfball, or may be made of a metal material or a synthetic resin material.

In addition, each of the connection and coupling members 510 has athrough hole, through which the coupling rod 400 extends.

The operation of the variable golf putter according to the fifthembodiment configured as described above will be described.

As shown in FIGS. 21 to 23, in the state in which the shaft 10 iscoupled to the first hitting member 300A, the second hitting member 300Bis located at one side of the first hitting member 300A, and the thirdhitting member 300C is located at one side of the second hitting member300B, one end of a connection and coupling member 510A is coupled to thepositioning recess 520 of the first hitting member 300A by insertion,and the other end of the connection and coupling member is coupled tothe positioning recess 520 formed in one surface of the second hittingmember 300B by insertion. In addition, one end of another connection andcoupling member 510B is coupled to the positioning recess 520 formed inthe other surface of the second hitting member 300B by insertion, andthe other end of the connection and coupling member is coupled to thepositioning recess 520 formed in one surface of the third hitting member300C by insertion.

Subsequently, the coupling rod 400 extends through the first hittingmember 300A, the first connection and coupling member 510A, the secondhitting member 300B, the second connection and coupling member 510B, andthe third hitting member 300B. Thereafter, nuts are fastened to thepositioning recess 520 formed in the other surface of the third hittingmember 300C and to the portion of the coupling rod 400 exposed in thepositioning recess 520 formed in the other surface of the first hittingmember 300A to integrate the first, second, and third hitting members300A, 300B, and 300C.

In this state, as shown in FIG. 23, a right-handed user may performputting practice using a putter having the putter head 200 including thefirst, second, and third hitting members 300A, 300B, and 300C. At thistime, the spherical hitting surface 320 or the planar hitting surface340 of the middle hitting member is used as a hitting surface configuredto hit a golf ball.

Meanwhile, in order to select the spherical hitting surface 320 fromamong the hitting surfaces 320 and 340, the user unfastens the nuts, bywhich the first, second, and third hitting members 300A, 300B, and 300Care integrated, from the coupling rod 40, separates the connection andcoupling members 510A and 510B from the middle hitting member, i.e. thesecond hitting member 300B, rotates the second hitting member 300B suchthat the spherical hitting surface 320 is oriented in the hittingdirection, and fastens the nuts to opposite ends of the coupling rod 40as described above to integrate the first, second, and third hittingmembers 300A, 300B, and 300C again.

In the case in which the user is a left-handed person, the user mayperform hitting after changing the hitting direction, as shown in FIG.24. That is, since the spherical and planar hitting surfaces 320 and 340are formed on a plurality of surfaces of each of the hitting members300B and 300C, the left-handed user may hold a club, and may performhitting in the state of changing the hitting direction.

In the golf putter for practice according to this embodiment, asdescribed above, the hitting surface may be selected by selecting thehitting members 300B and 300C. Consequently, it is possible to moreefficiently perform putting practice using various hitting surfaces 320and 340. In particular, the hitting surfaces 320 and 340 are formed inopposite directions such that the hitting direction is not fixed to oneside, whereby the left-handed user as well as the right-handed user mayeasily perform putting practice.

In addition, a hitting material 390 made of a material different fromthe materials of the hitting members 300B and 300C is provided in thespherical hitting surface 320 and the planar hitting surfaces 340, andtherefore it is possible to provide various hitting sensations to theuser at the time of hitting practice.

Among the accompanying drawings, FIG. 25 is an exploded perspective viewshowing a variable golf putter according to a sixth embodiment of thepresent disclosure. FIG. 26 is a perspective view showing a couplingstate of the variable golf putter shown in FIG. 25. FIG. 27 is asectional view taken along line A-A of FIG. 26.

As shown in FIGS. 25 to 27, the variable golf putter according to thesixth embodiment includes a putter head 20 having a shaft coupling hole21, to which the lower end 12 of a shaft 10 is coupled, and a headhitting surface 24 and a hitting member selectively coupled to theputter head 20.

A through hole 22, through which a fastening bolt 40 extends upwardsfrom the bottom surface thereof, is formed in the putter head 20 so asto be stepped. An incision portion 26 configured to open a portion ofthe upper surface 23 of the putter head 20 in the hitting direction isformed in the central region of the head hitting surface 24corresponding to the through hole 22. A coupling portion 23A is formedaround the through hole 22. The coupling portion 23A has a quadrangularsection.

Shaft coupling holes 21 of the putter head 20 are formed in oppositesides of the putter head 20 such that a right-handed person or aleft-handed person selects one of the shaft coupling holes and couplesthe shaft 10 to the selected shaft coupling hole. The lower end 12 ofthe shaft 10 and the shaft coupling hole 21 may be formed in a polygonalshape or may be formed so as to be coupled to each other through splinecoupling, whereby the coupling angle between the putter head 20 and theshaft 10 may be adjusted.

A hitting surface 34 may be formed at one or each of the outer surfacesof the hitting member 30. In this embodiment, however, a descriptionwill be given on the assumption that a hitting surface 34 is formed atone surface of the hitting member and an auxiliary hitting surface 34 isformed at the other surface of the hitting member. A coupling recess H,to which the coupling portion 23A is coupled by insertion, is formed inthe bottom surface of the hitting member so as to be open downwards. Ascrew fastening recess H1, to which a fastening bolt 40 is fastened, isformed in the bottom surface of the coupling recess H.

A hitting sound generation recess 34-4 configured to generate a hittingsound when a golf ball is hit by the entirety of the hitting surface 34or the region of the hitting surface 34 corresponding to a positivehitting point P is formed in the hitting member 30. As shown in FIGS. 27and 28, the hitting sound generation recess 34-4 may be formed in aregion corresponding to the hitting surface 34 or the region of thehitting surface 34 corresponding to the positive hitting point P so asto be open toward the bottom, the side, or the top of the hitting member30 or toward a coupling recess 35. Preferably, the hitting soundgeneration recess is open toward the bottom of the hitting member 30.

The reason that the hitting sound generation recess 34-4 is formed inthe hitting member 30 as described above is that a bright hitting soundis generated when a golf ball is hit at the positive hitting point P anda dull hitting sound is generated when the golf ball is hit by theregion of the hitting member deviating from the positive hitting pointP, whereby it is possible to audibly determine and recognize whethercorrect hitting has been performed.

Although not shown in the figures, the hitting sound generation recess34-4 may be filled with a hitting material made of a metal material or asynthetic resin material different from the material of the hittingmember 30, the hitting material may be coupled to the hitting soundgeneration recess by insertion, or the hitting material may beintegrally formed with the hitting member 30 through insert injectionmolding. Integration between the hitting material and the hitting memberis performed in order to generate various hitting sounds.

In addition, as shown in FIGS. 20, 25, and 26, the hitting soundgeneration recess 34-4 may not be formed in the hitting member 30. Thatis, the hitting sound generation recess 34-4 may be selectively formedas needed.

The hitting member 30 may be formed in the shape of a sphere, ahemisphere, a quadrangle, or a combination of a polygon, including aquadrangle, and a sphere.

The hitting member 30 and the putter head 20 configured as describedabove are coupled to each other through the following structure. Thatis, the fastening bolt 40 is fastened to the screw fastening recess H1through the through hole 22 in the state in which the coupling portion23A is inserted into and coupled to the coupling recess H such that thehitting surface 34 or the auxiliary hitting surface 34-6 protrudesthrough the incision portion 26 more than the head hitting surface 24 orcoincides with the head hitting surface 24, whereby the hitting member30 is replaceably coupled to the putter head 20.

In a hitting member 30 according to another embodiment, as shown inFIGS. 25 to 27, a mark C configured to indicate the hitting direction isformed on the outer circumferential surface of the hitting member 30 inthe form of a plurality of recesses or a line. The user may recognizethe putting direction through the mark C at the time of putting. To thisend, the marks C are formed in a line.

In a hitting member 30 according to yet another embodiment, as shown inFIGS. 25 to 27, a decorative member J1 made of a jewel or a quasi-jewelis provided at the upper surface of the hitting member. A portion of thedecorative member J1 may be coupled to an insertion recess formed in thecenter of the upper surface of the hitting member 30 by insertion, or amale-screw fastening portion provided at the decorative member J1 may becoupled to a screw hole formed in the upper surface of the hittingmember by fastening. This structure is configured to easily replace orexchange the decorative member J1. In this case, the decorative memberJ1 may be coupled to the recess-shaped mark C, or may be formed at aposition other than the mark C.

Also, in the case in which the hitting member 30 is formed so as to havethe shape of a sphere, a hemisphere, or a combination of a polygon and asphere, the total size (diameter) of the hitting member is set, ahitting position P2 for hitting is formed at the outer circumference ofthe sphere, and the distance L between the center P1 of the hittingmember 30 and the hitting position P2 is preset, a hemisphericalauxiliary member 34-6 is formed at the hitting surface 34 formed at theouter circumference thereof so as to protrude and an auxiliary hittingsurface 34-5 is formed at the hemispherical auxiliary member 34-6 suchthat the area of the hitting surface is increased or decreased, as shownin FIGS. 25 to 27.

That is, in the case in which the distance L between the center P1 ofthe hitting member 30 and the hitting position P2 is preset and the sizeof the hitting member 30 is preset, as shown in FIG. 27, it is notpossible to increase or decrease the area of the hitting surface 34formed at the outer circumference of the sphere. In order to solve this,the hemispherical auxiliary member 34-6 is formed at the hitting surface34 formed at the outer circumference of the sphere so as to protrude. Inaddition, the auxiliary hitting surface 34-5 is formed at the outercircumference of the auxiliary member 34-6 corresponding to the hittingposition P2 so as to be flat.

In other words, in order to form a hitting member 30 configured suchthat the area of the auxiliary hitting surface 34-5 is large, the sizeof the auxiliary member 34-6 is increased such that the auxiliaryhitting surface 34-5 is formed at the top region (hitting position) ofthe auxiliary member 34-6 so as to have a large area. In order to form ahitting member 30 configured such that the area of the auxiliary hittingsurface 34-5 is small, the size of the auxiliary member 34-6 isdecreased, and the auxiliary hitting surface 34-5 is formed at the topregion (hitting position) of the auxiliary member 34-6 so as to have asmall area. Through the above procedures, hitting members 30 includingauxiliary hitting surfaces 34-5 having different sizes (areas) may beprovided.

That is, it is possible to obtain a hitting member 30 configured suchthat the area of the auxiliary hitting surface 34-5 is large byincreasing the area of the auxiliary hitting surface 34-5 or to obtain ahitting member 30 configured such that the area of the auxiliary hittingsurface 34-5 is small by decreasing the area of the auxiliary hittingsurface 34-5 without changing the distance L between the hittingposition P2 for hitting and the center P1 of the hitting member 30.

It is obvious to a person having ordinary skill in the art that,although the specific embodiments of the present disclosure have beenshown and described above, the present disclosure is not limited to thedescribed embodiments and various changes and modifications are possiblewithout departing from the idea and scope of the present disclosure.Thus, it is intended that the changes or the modifications should not beunderstood independently of the technical spirit or prospect of thepresent disclosure and that modified embodiments fall within the scopeof the claims of the present disclosure.

INDUSTRIAL APPLICABILITY

The present disclosure is configured to selectively couple hittingmembers having various hitting areas to a putter head in order toperform hitting practice, and may provide various hitting sensations toa user. Consequently, the present disclosure is usefully applicable tothe golf industry and thus has industrial applicability.

1. A variable golf putter comprising: a putter head coupled to a lowerend of a shaft, the putter head having a head hitting surface; and ahitting member selectively coupled to the putter head, wherein a throughhole, through which a fastening bolt extends upwards from a bottomsurface thereof, is formed in the putter head so as to be stepped, andan incision portion configured to open a portion of an upper surface ofthe putter head in a hitting direction is formed in the head hittingsurface corresponding to the through hole, the hitting member is formedin a golf ball shape and has a hitting surface formed on an outercircumferential surface thereof, a seating surface and a supportingsurface supported by an edge of the upper surface so as to be seated onthe upper surface are formed at a bottom surface of the hitting memberso as to be stepped, a screw fastening recess, to which the fasteningbolt is coupled by fastening, is formed in the seating surface, and thehitting member is replaceably coupled to the putter head via thefastening bolt in a state of being seated on the surface such that aportion of the hitting surface protrudes through the incision portionmore than the head hitting surface, the hitting surface of the hittingmember is constituted by a spherical hitting surface having identicalcurvature to a golf ball or a planar hitting surface, and, in a case inwhich the hitting surface is constituted by a planar hitting surface, aplurality of hitting members is provided by area of the planar hittingsurface and is selectively coupled to the putter head.
 2. A variablegolf putter comprising: a putter head coupled to a lower end of a shaft,the putter head having a head hitting surface; and a hitting memberselectively coupled to the putter head, wherein a through hole, throughwhich a fastening bolt extends upwards from a bottom surface thereof, isformed in the putter head so as to be stepped, an incision portionconfigured to open a portion of an upper surface of the putter head in ahitting direction is formed in the head hitting surface corresponding tothe through hole, and a triangular to octagonal coupling protrusionprotrudes upwards from the upper surface in which the through hole isformed, the hitting member is formed in a golf ball shape or a polygonalshape, hitting surfaces having different shapes and different sizes areformed on an outer surface of the hitting member, a seating surface,which is seated on the upper surface, is formed at a bottom surface ofthe hitting member, a triangular to octagonal coupling recess is formedin the seating surface such that the coupling protrusion is insertedinto and coupled to the coupling recess when the seating surface isseated on the upper surface, and has coupling surfaces having identicaldirections to the hitting surfaces, and a screw fastening recess, towhich the fastening bolt is coupled by fastening, is formed in thecoupling recess, the coupling protrusion is coupled to the couplingrecess in a state in which an orientation of the hitting member is setsuch that a hitting surface selected from among the hitting surfaces isexposed through the incision portion, and the fastening bolt is coupledto the screw fastening recess of the coupling recess through the throughhole by fastening, and the hitting surface of the hitting member isconstituted by a spherical hitting surface having identical curvature toa golf ball or a planar hitting surface, and, in a case in which thehitting surface is constituted by a planar hitting surface, a pluralityof hitting members is provided by area of the planar hitting surface andis selectively coupled to the putter head.
 3. The variable golf putteraccording to claim 2, wherein a hitting material made of a materialdifferent from a material of the hitting member is provided integrallyat the spherical hitting surface or the planar hitting surface, and ahitting material recess formed in the spherical hitting surface or theplanar hitting surface is filled with the hitting material, or thehitting material is integrally formed with the hitting member throughinsert injection molding.
 4. The variable golf putter according to claim2, wherein the lower end of the shaft is formed in a polygonal shape,polygonal coupling portions, to each of which the lower end of the shaftis coupled, are formed at opposite sides of the putter head such thatone of the polygonal coupling portions is selected and used by aleft-handed person or a right-handed person, and the lower end of theshaft and the coupling portion are coupled to each other via a boltfastened from a bottom surface of the putter head in a state in whichthe lower end of the shaft is fitted in the coupling portion such that acoupling angle therebetween is adjusted.
 5. The variable golf putteraccording to claim 2, wherein a thickness adjustment recess is formedaround the coupling recess of the hitting member, and the thicknessadjustment recess is formed so as to have different widths such that thehitting surfaces have different thicknesses based on the couplingsurfaces, whereby different hitting sensations and hitting sounds aregenerated.
 6. (canceled)
 7. (canceled)
 8. (canceled)
 9. (canceled) 10.(canceled)
 11. (canceled)
 12. (canceled)
 13. A variable golf puttercomprising: a putter head having a shaft coupling hole, to which a lowerend of a shaft is coupled, and a head hitting surface; and a hittingmember selectively coupled to the putter head, wherein a through hole,through which a fastening bolt extends upwards from a bottom surfacethereof, is formed in the putter head so as to be stepped, an incisionportion configured to open a portion of an upper surface of the putterhead in a hitting direction is formed in the head hitting surfacecorresponding to the through hole, and a coupling portion is formedaround the through hole, a hitting surface is formed at one or each ofouter surfaces of the hitting member, a coupling recess, to which thecoupling portion is coupled by insertion, is formed in a bottom surfaceof the hitting member so as to be open downwards, a screw fasteningrecess is formed in a bottom surface of the coupling recess, and thefastening bolt is fastened to the screw fastening recess through thethrough hole in a state in which the coupling portion is inserted intoand coupled to the coupling recess such that the hitting surfaceprotrudes through the incision portion more than the head hittingsurface or coincides with the head hitting surface, whereby the hittingmember is replaceably coupled to the putter head, and a hitting soundgeneration recess configured to generate a hitting sound when a golfball is hit by all the hitting surface or a region of the hittingsurface corresponding to a positive hitting point is formed in thehitting member.
 14. A variable golf putter comprising: a putter headhaving a shaft coupling hole, to which a lower end of a shaft iscoupled, and a head hitting surface; and a hitting member selectivelycoupled to the putter head, wherein a through hole, through which afastening bolt extends upwards from a bottom surface thereof, is formedin the putter head so as to be stepped, an incision portion configuredto open a portion of an upper surface of the putter head in a hittingdirection is formed in the head hitting surface corresponding to thethrough hole, and a coupling portion is formed around the through hole,a hitting surface is formed at one or each of outer surfaces of thehitting member, a coupling recess, to which the coupling portion iscoupled by insertion, is formed in a bottom surface of the hittingmember so as to be open downwards, and a screw fastening recess isformed in a bottom surface of the coupling recess, and the fasteningbolt is fastened to the screw fastening recess through the through holein a state in which the coupling portion is inserted into and coupled tothe coupling recess such that the hitting surface protrudes through theincision portion more than the head hitting surface or coincides withthe head hitting surface, whereby the hitting member is replaceablycoupled to the putter head.
 15. The variable golf putter according toclaim 13, wherein the hitting sound generation recess is formed in aregion corresponding to the hitting surface or a region of the hittingsurface corresponding to the positive hitting point so as to be opentoward a bottom, a side, or a top of the hitting member or toward thecoupling recess.
 16. The variable golf putter according to claim 15,wherein the hitting sound generation recess is filled with a metalmaterial or a synthetic resin material different from a material of thehitting member, the metal material or the synthetic resin material iscoupled to the hitting sound generation recess by insertion, or themetal material or the synthetic resin material is integrally formed withthe hitting member through insert injection molding.
 17. The variablegolf putter according to claim 13, wherein the hitting member is formedin a shape of a sphere, a hemisphere, or a combination of a polygon anda sphere, and a mark configured to indicate the hitting direction isformed on an outer circumferential surface of the hitting member in aform of a plurality of recesses or a line.
 18. The variable golf putteraccording to claim 13, wherein a decorative member for decoration isprovided at an upper surface of the hitting member, and a portion of thedecorative member is coupled to the hitting member by insertion, or afastening portion provided at the decorative member is coupled to ascrew hole formed in the upper surface of the hitting member byfastening.
 19. The variable golf putter according to claim 13, whereinshaft coupling holes of the putter head are formed in opposite sides ofthe putter head such that a right-handed person or a left-handed personselects one of the shaft coupling holes and couples the shaft to theselected shaft coupling hole.
 20. The variable golf putter according toclaim 13, wherein, in a case in which the hitting member is formed in ashape of a sphere, a hemisphere, or a combination of a polygon and asphere, the hitting surface is formed at an outer circumference of thehitting member, and a distance between a center of the hitting memberand a hitting position is preset, a hemispherical auxiliary member isformed at the hitting surface so as to protrude and an auxiliary hittingsurface is formed at the hemispherical auxiliary member such that anarea of the hitting surface is increased or decreased.
 21. The variablegolf putter according to claim 1, wherein a hitting material made of amaterial different from a material of the hitting member is providedintegrally at the spherical hitting surface or the planar hittingsurface, and a hitting material recess formed in the spherical hittingsurface or the planar hitting surface is filled with the hittingmaterial, or the hitting material is integrally formed with the hittingmember through insert injection molding.
 22. The variable golf putteraccording to claim 1, wherein the lower end of the shaft is formed in apolygonal shape, polygonal coupling portions, to each of which the lowerend of the shaft is coupled, are formed at opposite sides of the putterhead such that one of the polygonal coupling portions is selected andused by a left-handed person or a right-handed person, and the lower endof the shaft and the coupling portion are coupled to each other via abolt fastened from a bottom surface of the putter head in a state inwhich the lower end of the shaft is fitted in the coupling portion suchthat a coupling angle therebetween is adjusted.
 23. The variable golfputter according to claim 14, wherein the hitting member is formed in ashape of a sphere, a hemisphere, or a combination of a polygon and asphere, and a mark configured to indicate the hitting direction isformed on an outer circumferential surface of the hitting member in aform of a plurality of recesses or a line.
 24. The variable golf putteraccording to claim 14, wherein a decorative member for decoration isprovided at an upper surface of the hitting member, and a portion of thedecorative member is coupled to the hitting member by insertion, or afastening portion provided at the decorative member is coupled to ascrew hole formed in the upper surface of the hitting member byfastening.
 25. The variable golf putter according to claim 14, whereinshaft coupling holes of the putter head are formed in opposite sides ofthe putter head such that a right-handed person or a left-handed personselects one of the shaft coupling holes and couples the shaft to theselected shaft coupling hole.
 26. The variable golf putter according toclaim 14, wherein, in a case in which the hitting member is formed in ashape of a sphere, a hemisphere, or a combination of a polygon and asphere, the hitting surface is formed at an outer circumference of thehitting member, and a distance between a center of the hitting memberand a hitting position is preset, a hemispherical auxiliary member isformed at the hitting surface so as to protrude and an auxiliary hittingsurface is formed at the hemispherical auxiliary member such that anarea of the hitting surface is increased or decreased.